I just finished Madoka Magica... I have NOTHING but good things to say about this animé, holy crap! I passed it over so many times because it looked like a generic sparkly kawaii magical girl anime. Anyone who has seen it can tell you it's anything but.
This piece came out well, I'm proud. It represents Kyubey's mission through the imagery of stars twinkling in blood, and of course the dichotomy of such callous evil in such a cute little creature.
I have put this image up on my RedBubble, you can buy it on many types of merch if that sort of thing interests you! http://www.redbubble.com/people/growly/works/20028969-entropy-kyubey-from-madoka